It is easy to wash clothes in hot water because its :-

Options

A. surface tension is more
B. surface tension is less
C. consumes less soap
D. none of these

Answer

To solve the question "It is easy to wash clothes in hot water because its:", we need to analyze the relationship between temperature, surface tension, and the washing process. Here’s a step-by-step solution:

### Step 1: Understand Surface Tension
Surface tension is a physical property of liquids that describes the elastic tendency of a fluid surface. It is the force that causes the surface of a liquid to behave like a stretched elastic membrane.

**Hint:** Surface tension is influenced by temperature; it is important to know how temperature affects it.

### Step 2: Effect of Temperature on Surface Tension
As the temperature of a liquid increases, its surface tension generally decreases. This is because the increased kinetic energy at higher temperatures allows the molecules to move more freely, reducing the cohesive forces that contribute to surface tension.

**Hint:** Remember that heating a liquid increases the energy of its molecules, which can affect the forces between them.

### Step 3: Washing Clothes with Hot Water
When washing clothes, the goal is to remove dirt and stains. A lower surface tension in hot water means that the water can more easily penetrate the fabric and interact with dirt particles, allowing for more effective cleaning.

**Hint:** Consider how the interaction between water molecules and dirt molecules changes with surface tension.

### Step 4: Conclusion
Since the surface tension of water decreases with an increase in temperature, it becomes easier to wash clothes in hot water because the lower surface tension allows for better removal of dirt. Therefore, the correct answer to the question is that it is easy to wash clothes in hot water because its surface tension is low.

**Final Answer:** It is easy to wash clothes in hot water because its surface tension is low.

### Summary of Steps:
1. Understand what surface tension is.
2. Learn how temperature affects surface tension.
3. Apply this knowledge to the process of washing clothes.
4. Conclude that lower surface tension in hot water aids in cleaning.